EP1726967B1 - Procédé et dispositif destinés à mesurer un courant passant dans un conducteur électrique - Google Patents

Procédé et dispositif destinés à mesurer un courant passant dans un conducteur électrique Download PDF

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Publication number
EP1726967B1
EP1726967B1 EP06010079.9A EP06010079A EP1726967B1 EP 1726967 B1 EP1726967 B1 EP 1726967B1 EP 06010079 A EP06010079 A EP 06010079A EP 1726967 B1 EP1726967 B1 EP 1726967B1
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EP
European Patent Office
Prior art keywords
section
sensor
electrical conductor
magnetic field
measurement
Prior art date
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Expired - Fee Related
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EP06010079.9A
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German (de)
English (en)
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EP1726967A1 (fr
Inventor
Christian Hausperger
Edgar Kindler
Ricardo Erckert
Bernhard Röllgen
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TDK Electronics AG
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Epcos AG
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
    • G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
    • G01R15/18—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using inductive devices, e.g. transformers
    • G01R15/183—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using inductive devices, e.g. transformers using transformers with a magnetic core
    • G01R15/185—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using inductive devices, e.g. transformers using transformers with a magnetic core with compensation or feedback windings or interacting coils, e.g. 0-flux sensors
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
    • G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
    • G01R15/20—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using galvano-magnetic devices, e.g. Hall-effect devices, i.e. measuring a magnetic field via the interaction between a current and a magnetic field, e.g. magneto resistive or Hall effect devices
    • G01R15/202—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using galvano-magnetic devices, e.g. Hall-effect devices, i.e. measuring a magnetic field via the interaction between a current and a magnetic field, e.g. magneto resistive or Hall effect devices using Hall-effect devices
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC

Definitions

  • the present invention relates to a method and apparatus for measuring a current flowing in an electrical conductor.
  • the on-board battery is increasingly loaded, which serves as a buffer during operation of the vehicle engine and maintains the power supply of the vehicle in the off state of the engine.
  • this may mean that the battery is no longer fully charged during operation of the engine. This can result in the vehicle remaining idle with a discharged battery or being unable to start due to low battery voltage.
  • Such energy management has to ensure that the state of charge of the battery does not reach a critical state and has to ensure a positive charge balance of the battery.
  • the basis for such a system is the analysis of the battery status, which is derived from the measured quantities battery current, battery voltage and battery temperature. In this case, it is above all the detection of the charging or discharging current that is of crucial importance in order to keep the battery at a non-critical charging level and to ensure the starting capability of the vehicle.
  • the challenge in detecting the charge or discharge current is that the currents to be measured are spread over a very large range, for example, from -200 A to 1500 A.
  • a suitable sensor for energy management in vehicles must cover this wide range So have a high dynamic.
  • a measuring method and apparatus for measuring large dynamic range currents by means of a compensation current sensor is described.
  • a magnetic core is driven by applying current pulses to a compensation coil in a first and an opposite second direction to saturation and determined in each case a first and second primary current value.
  • a corrected primary current value is calculated by averaging the first and second primary current values.
  • a first and a second toroid wound with a wire are used, wherein the electrical conductor and the second ring core extend through the inner diameter of the first ring core.
  • For determining the current flowing through the electrical conductor is an alternating current for periodically and magnetically saturating a Part of the first and second toroidal core to the wire, which stimulates the second ring core applied.
  • FIGS. 9 and 10 shown sensor for use in a motor vehicle for monitoring the flowing currents known.
  • a measuring resistor 202 is inserted in the ground line 201.
  • a suitable evaluation electronics 203 directly measures the voltage drop across the measuring resistor and calculates the flowing current from this.
  • the measuring resistor can for example consist of manganin.
  • FIG. 9 the measuring setup to be realized with this sensor is shown.
  • a car battery 205 is connected via a ground line 202 to the vehicle ground.
  • the sensor consisting of the measuring resistor 202 and the evaluation electronics 203 are integrated in the ground line 201.
  • Electrical consumers 206 of the motor vehicle are connected to the positive pole of the battery 205 via a line 207.
  • a disadvantage of this known from the prior art solution is that the measuring resistor must be integrated in the current-carrying conductor, which causes additional design effort, since it must be ensured that shear and tensile forces kept away from the measuring resistor become. A deformation of the measuring resistor can influence the measurement result and in extreme cases leads to a defect in the sensor.
  • Another disadvantage is that above the measuring resistor necessarily dissipates a power loss. However, even when using small resistors, for example a 100 ⁇ measuring resistor, loss of heat still falls, which must be dissipated.
  • the object is achieved by a method for measuring a current flowing in an electrical conductor according to claim 1 and by a device for measuring a current flowing in an electrical conductor according to claim 11.
  • a sensor arranged in the region of the electrical conductor is used for measuring the magnetic field surrounding the electrical conductor, the sensor having a magnetic circuit with a first and a second section. Furthermore, a magnetizing device for magnetic saturation of the second portion is provided.
  • the sensor used Due to its special design, the sensor used has a measuring range switchover, which is described in detail in the description of the figures. Due to the measuring range switchover, a wide measuring range, ie high dynamics of the sensor, is achieved. However, this high dynamics is accompanied by system-related measurement errors resulting from a possible hysteresis of the second section and a possible temperature drift of individual components. The following process steps allow a measurement that eliminates these measurement errors.
  • the steps described below are carried out according to the method.
  • a first step the magnetic field is measured in each case after switching off both a positive and a negative saturation of the second section, and then the mean value is calculated from the measured values.
  • a second step the magnetic field is measured at both positive and negative saturation of the second section, and then the mean value is calculated from the measured values.
  • the current flowing through the electrical conductor is calculated by subtracting the mean value calculated in the second step from the mean value calculated in the first step and multiplying the result by a constant.
  • the order of the first and second steps can also be reversed.
  • This method ensures that with a potential-free sensor, the current can be measured over a wide measuring range and possible system-related measurement errors can be eliminated.
  • the constant is chosen such that it takes into account the sensitivity of the sensor both in the saturated and in the unsaturated second section. hereby can be specified directly from the measured values of the current flowing through the conductor.
  • the second section is positively saturated and the magnetic field is measured.
  • the saturation is switched off and then the magnetic field is measured again.
  • the second section is negatively saturated and then the magnetic field is measured.
  • the magnetic field is measured.
  • the mean value is then formed from the values measured in steps two and four, and in a sixth step the mean value is formed from the values measured in the first and third steps.
  • the current flowing through the conductor is then calculated by subtracting the mean calculated in the seventh step from the mean calculated in the sixth step and then multiplying by a constant taking into account the sensitivity of the saturated and unsaturated second section sensor.
  • This procedure can be used to shorten the time required to record the required readings.
  • the individual process steps can be carried out repeatedly in order to determine the course of the current over time.
  • the execution of the method is simplified if all steps are performed automatically in an evaluation device.
  • This evaluation device advantageously outputs only the determined value of the current and / or makes it available.
  • the evaluation device controls automatically with advantage the measuring process, in particular the switching on and off of the magnetizing device.
  • the method described can be carried out in a vehicle, in particular in a motor vehicle, in particular for monitoring the battery current of a vehicle or for monitoring individual consumers or consumer groups.
  • the first section has a first saturation magnetization and the second section has a second saturation magnetization, wherein the first saturation magnetization is smaller, equal to or greater than the second saturation magnetization.
  • the parameters of the sensor can be adjusted by selecting the respective combination of saturation magnetizations.
  • the device for measuring a current flowing in an electrical conductor comprises a sensor arranged in the region of the electrical conductor for measuring the magnetic field surrounding the electrical conductor.
  • the sensor has a magnetic circuit with a first and a second section and a magnetizing device for saturating the second section is provided.
  • An evaluation device for calculating the current flowing through the electrical conductor as a function of measured values of the magnetic field surrounding the electrical conductor and as a function of the respective magnetization of the second section is furthermore provided.
  • the magnetic circuit has an air gap and an air gap arranged magnetic field-sensitive component, in particular a Hall sensor, for measuring the magnetic field surrounding the electrical conductor.
  • the magnetic circuit substantially surrounds the electrical conductor.
  • the evaluation device comprises means for performing, in particular for the automatic implementation of the method described above.
  • This also includes, in particular, means for controlling the magnetization device.
  • a compact design By integrating the evaluation device with the sensor, a compact design can be achieved.
  • a high flexibility in the arrangement can be achieved by spatial separation of evaluation device and sensor.
  • the first section of the magnetic circuit has at least two legs which overlap one another and form an air gap in the region of the overlap.
  • the legs may be substantially arcuately shaped to allow overstretching of a conductor.
  • the second section can furthermore be designed as a rectangular ferrite core frame, which carries a control winding on at least one side.
  • the ferrite core frame may each support a control winding on each long side of the rectangular ferrite core frame to achieve a symmetrical construction.
  • the senor in the region of a ground conductor or a positive conductor of a vehicle battery, in particular a Motor vehicle battery, be arranged, or in the range of an electrical load or a group of electrical consumers of a vehicle, in particular a motor vehicle, be arranged.
  • the method described and the device described can be used in a motor vehicle for monitoring currents in the electrical system.
  • Fig. 1 shows schematically a possible first embodiment of a sensor used in the device for measuring a magnetic field surrounding the electrical conductor, which can also be used to carry out the method.
  • the sensor 1 is used to measure the magnetic field surrounding the electrical conductor 2 when current flows through it.
  • the sensor 1 has a magnetic circuit which essentially encloses the electrical conductor 2.
  • the magnetic circuit has a first, substantially U-shaped section 3, which is formed from an amorphous material with a high saturation magnetization.
  • the magnetic circuit is closed on the open side of the first section 3 except for an air gap 30 through a second section 41 of the magnetic circuit.
  • the second section of the magnetic circuit is part of a closed, frame-shaped ferrite core 4, which has a lower saturation magnetization than the first section.
  • the air gap 30 formed between the one leg of the U-shaped first section 3 and the end of the second section 41 is completely filled by a Hall sensor 5.
  • the Hall sensor serves to measure the magnetic field surrounding the electrical conductor.
  • the second portion 41 opposite leg of the ferrite core 4 carries a control winding 40, with which the ferrite core can be saturated.
  • the sensor For the application of the sensor 1 over the largest possible measuring range, ie with the highest possible dynamics, the sensor is operated as follows: At low currents, the sensor is operated with high sensitivity. For this purpose, the ferrite core 4 is operated unsaturated, the control winding 40 is thus de-energized. The magnetic circuit then consists of the first section 3 and the second section 41. Only the small air gap 30, which is filled with the Hall sensor 5, is provided. In this way, small magnetic fields can be measured at currents of up to about 20A.
  • the ferrite core 4 is operated by applying a magnetic field by means of the control winding 40 in saturation.
  • the ferrite core 4 and thus also the second portion 41 of the magnetic circuit for the magnetic circuit is no longer effective.
  • the air gap of the magnetic circuit is therefore increased by the leg length of the second section 41.
  • the bound field in the magnetic circuit is attenuated by the now large air gap 31, so that the sensitivity of the sensor 1 is reduced and with the Hall sensor 5 large currents can be detected.
  • Fig. 2 shows exemplary measuring curves to illustrate the context.
  • the magnetic field H surrounding the electrical conductor which is likewise bound in the magnetic circuit and which is dependent on the current flowing through the electrical conductor I DC, is plotted here on the X axis.
  • the magnetic field B measured by the Hall sensor is plotted on the Y axis.
  • the solid curve 90 shows the relationship when the control winding 40 is switched off, that is to say with a small air gap. Here is a high sensitivity to observe.
  • the dashed line 91 shows the relationship when the control winding 40 is switched on, that is to say with a large air gap. Here, a low sensitivity of the measuring sensor is observed.
  • the sensor 1 described above is used in the following to explain the method underlying the application and the device.
  • the hysteresis of the ferrite core 4 can lead to an error in the measurement result.
  • a temperature drift of the Hall sensor and a long-term drift of the other components from which the sensor is constructed can also lead to a distortion of the measurement signal.
  • These two possible causes of error can result in a zero offset, i. the respective measurement curves no longer run through the origin of the H / B coordinate system.
  • the method described below is used to correct these possible errors.
  • the point B (P1) lies on the lower branch 93 of the hysteresis curve, whereas the measuring point B (P2) lies on the upper branch 92 of the hysteresis curve.
  • the ideal magnetization curve 94 is as shown in FIG Fig. 3 can be seen, even offset by an offset B offset , which is caused by temperature influences or by a general component drift.
  • the Indian Fig. 3 shown offset error can be corrected by determining another point.
  • the determination of this further point B (P4) is made on the basis of Fig. 4 explained.
  • Fig. 4 is the solid curve 90 again the curve at a small air gap, so high sensitivity of the sensor and the curve 91, which is shown in dashed lines, the curve at a large air gap, so low sensitivity of the sensor.
  • the measuring points B (P4 +) and B (P4-) are now measured, while the ferrite core 4 is operated saturated, so the sensor is operated with low sensitivity.
  • the measuring point B (P4 +) adjusts itself when the ferrite core 4 is positively saturated by corresponding excitation of the control coil 40.
  • the measurement point B (P4-) however, with correspondingly negative saturation of the ferrite core 4.
  • the magnetization of the ferrite core 4 causes a positive or negative stray field, which distorts the respective measurement results.
  • the subsequent averaging of the measured values B (P4 +) and B (P4-) shortens the influence of this stray field.
  • B (P4) is also shifted by an error B offset .
  • S sat is the sensitivity of the sensor when the ferrite core 4 is saturated, so a large air gap 31 is provided.
  • the device which is composed of the sensor 1 and the evaluation device 6.
  • the evaluation device 6 is designed so that it can process measured values of the Hall sensor 5 as well as information about the respective control voltage of the control coil 40 in order to calculate the current flowing through the electrical conductor.
  • the evaluation device 6 can also control the method, that is to say cause the current to be supplied to the control coil 40 and to record, store and process the measured values at the correct time.
  • the evaluation device 6 may have an interface, not shown in the figures, which communicates with an amplifier for energizing the control coil 40 and the Hall probe 5.
  • means for storing the measured data are provided.
  • the amplifier may also be integrated with the evaluation device.
  • Fig. 5 is the combination of sensor 1 and evaluation device 6 in the leading to an electrical load 23 of a vehicle positive line 20th brought in.
  • the positive line 20 leads from a battery 22 to the electrical consumer 23.
  • the ground line 21 is connected to the ground conductor of the vehicle.
  • the sensor 1 is arranged directly after the positive pole of the battery 22. This is also referred to as a "high-side" arrangement of the sensor.
  • Fig. 6 the corresponding arrangement of the sensor 1 is shown in the ground line 21 of the respective on-board circuit. This is also referred to as a "low-side" arrangement of the sensor.
  • the evaluation device 6 can also be arranged separately from the sensor 1.
  • FIGS. 7 and 8 a second embodiment of a current sensor 1 is shown, with which the method can be carried out and which can be provided in the device, wherein Fig. 7 a side view and Fig. 8 a plan view of the sensor shows.
  • a flat electrical conductor 2, for example a ribbon conductor, a sheet metal conductor or a conductor provided on a printed circuit board is enclosed by the sensor 1.
  • the sensor 1 has a magnetic circuit which consists of a first section 3, which is here formed by a first leg 3a and a second leg 3b and a second section 41.
  • the legs 3a and 3b of the first section 3 overlap each other in the central region of this section, but are spaced apart by an air gap 30.
  • the legs 3 a, 3 b are arcuately shaped and together form a semicircle.
  • a Hall sensor 5 is introduced, which serves to measure the existing flux in the magnetic circuit.
  • the second portion is, as seen in the plan view, designed as a rectangular ferrite core 4 and carries in the area 41 in turn a magnetization device in the form of control windings 40, which are respectively applied to the respective long sides of the rectangular ferrite core 4.
  • the lower legs of the first section are connected to this rectangular ferrite frame 4 in the central region of the short sides of the rectangular ferrite frame 4.
  • the control windings 40 remain de-energized.
  • the ferrite core frame 4 is operated by applying a magnetic field by means of the control windings 40 in saturation.
  • the ferrite core frame 4 and thus also the second portion 41 of the magnetic circuit for the magnetic circuit is no longer effective.
  • the air gap of the magnetic circuit is therefore increased by the leg length of the second section 41.
  • the bound field in the magnetic circuit is attenuated by the additional large air gap 31, so that the sensitivity of the sensor 1 is reduced and with the Hall sensor 5 large currents can be detected.
  • the total air gap in this second embodiment of the sensor is the sum of the air gap 30 of the first section 3 of the magnetic circuit and the air gap 31 of the second section 41 of the magnetic circuit.
  • the device and the method can not only serve to monitor the entire vehicle electrical system, but can also measure current values of individual consumers or individual consumer groups.
  • the use of the sensor is independent of the applied voltage in all cases. Since this is also a potential-free measurement, it is also possible to use it at high voltages.
  • a universal use of the device for measuring the current is possible with it. In particular, use in vehicles with a higher vehicle electrical system voltage, for example in vehicles with a hybrid drive is possible.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Claims (27)

  1. Procédé, destiné à mesurer un courant passant dans un conducteur électrique (2), au moyen d'un capteur (1) placé dans la région du conducteur électrique, pour la mesure du champ magnétique qui entoure le conducteur électrique, le capteur comportant un circuit magnétique doté d'un premier (3) et d'un deuxième (41) segments et un dispositif d'aimantation (40) pour la saturation magnétique du deuxième segment étant prévu, comportant les étapes suivantes, consistant à :
    a. mesurer le champ magnétique, chaque fois après la mise à l'arrêt, aussi bien d'une saturation positive que négative du deuxième segment et à calculer consécutivement calcul la valeur moyenne (B(P0)), à partir des valeurs mesurées (B(P1), B (P2)),
    b. mesurer le champ magnétique, aussi bien dans le cas d'une saturation magnétique positive que négative du deuxième segment et à calculer consécutivement la valeur moyenne (B(P4)), à partir des valeurs mesurées (B(P4+), B(P4-)),
    c. calculer le courant circulant à travers le conducteur électrique par soustraction de la valeur moyenne (B(P4)) obtenue dans l'étape b. de la valeur moyenne (B(P0) calculée dans l'étape a. et à multiplier la différence avec une constante.
  2. Procédé selon la revendication 1, caractérisé en ce que la constante dans l'étape c. prend en considération la sensibilité du capteur, aussi bien lorsque le deuxième segment est magnétiquement saturé, que lorsque le deuxième segment est magnétiquement insaturé.
  3. Procédé selon la revendication 1, caractérisé en ce que le procédé revendiqué dans la revendication 1 est réalisé avec les étapes suivantes, consistant dans :
    a. la saturation magnétique positive du deuxième et dans la mesure du champ magnétique (B(P4+)),
    b. la mise à l'arrêt de la saturation magnétique du deuxième segment et la mesure consécutive du champ magnétique (B(P2)),
    c. la saturation magnétique négative du deuxième segment et la mesure du champ magnétique (B(P4-)),
    d. la mise à l'arrêt de la saturation magnétique du deuxième segment et la mesure consécutive du champ magnétique (B(P1)),
    e. le calcul de la valeur moyenne (B(P0)) à partir des valeurs (B(P1), B(P2)) mesurées dans les étapes b. et d.,
    f. le calcul de la valeur moyenne (B(P4)) des valeurs (B(P4+), B(P4-)) obtenues dans les étapes a. et c.,
    g. le calcul du courant (IDC) circulant à travers le conducteur électrique par soustraction de la valeur moyenne (B(P4)) calculée dans l'étape f. de la valeur moyenne (B(P0)) calculée dans l'étape e. et la multiplication consécutive avec une constante (1/Sunsat (1-K)) (B(P0)) tenant compte de la sensibilité du capteur, lorsque le deuxième segment est magnétiquement saturé et magnétiquement insaturé.
  4. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que les étapes de procédé sont réalisées de manière répétitive.
  5. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que toutes les étapes sont réalisées automatiquement dans un dispositif d'évaluation (6).
  6. Procédé selon la revendication 5, caractérisé en ce que le dispositif d'évaluation n'édite ou ne met à disposition que la valeur déterminée du courant (IDC) .
  7. Procédé selon la revendication 5 ou 6, caractérisé en ce que le dispositif d'évaluation commande automatiquement le processus de mesure, notamment la mise en route et à l'arrêt du dispositif d'aimantation (40).
  8. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il est réalisé dans un véhicule, notamment dans un véhicule automatique.
  9. Procédé selon la revendication 8, caractérisé en ce qu'il est destiné à la supervision du courant de batterie d'un véhicule ou à la supervision de consommateurs (23) individuels ou de groupes de consommateurs.
  10. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que le premier tronçon fait preuve d'une première aimantation de saturation et en ce que le deuxième tronçon fait preuve d'une deuxième aimantation de saturation et en ce que la première aimantation de saturation est supérieure, inférieure ou égale à la deuxième aimantation de saturation.
  11. Dispositif, destiné à mesurer un courant circulant dans un conducteur électrique (2), pourvu d'un capteur (1) placé dans la région du conducteur électrique, destiné à mesurer le champ magnétique entourant le conducteur électrique, le capteur comportant un circuit magnétique doté d'un premier (3) et d'un deuxième (41) segments, d'un dispositif d'aimantation (40), destiné à la saturation magnétique du deuxième segment et par ailleurs le dispositif d'évaluation (6) étant conçu pour le champ magnétique destiné à calculer le courant passant par ailleurs par l'intermédiaire du conducteur électrique en fonction de valeurs de mesure (B(PO), B(P1), B(P2)), B(P4), B(P4+), B(P4-)) du champ magnétique entourant le conducteur électrique et en fonction de l'aimantation respective du deuxième segment, le dispositif d'évaluation (6) étant conçu pour réaliser les étapes suivantes, consistant à :
    a. mesurer le champ magnétique, chaque fois après la mise à l'arrêt, aussi bien d'une saturation magnétique positive que négative du deuxième segment et à calculer consécutivement la valeur moyenne (B(PO)) à partir des valeurs mesures (B(P1), B(P2)),
    b. mesurer le champ magnétique, aussi bien à saturation magnétique positive que négative des deux segments et à calculer consécutivement la valeur moyenne (B(P4)) à partir des valeurs de mesure (B(P4+), (B(P4-)),
    c. calculer le courant circulant à travers le conducteur électrique, par soustraction de la valeur moyenne (B(P4)) calculée dans l'étape a. de la valeur moyenne (B(PO) calculée dans l'étape b. et par multiplication de la différence avec une constante.
  12. Dispositif selon la revendication 11, caractérisé en ce que le circuit magnétique comporte un entrefer (30, 31) et un composant (5) sensible au champ magnétique, placé dans l'entrefer, notamment un capteur de Hall destiné à mesurer le champ magnétique entourant le conducteur électrique.
  13. Dispositif selon la revendication 11 ou 12, caractérisé en ce que le circuit magnétique enveloppe sensiblement le conducteur électrique.
  14. Dispositif selon l'une quelconque des revendications 11 à 13, caractérisé en ce que le dispositif d'évaluation comporte des moyens, destinés à réaliser, notamment à réaliser automatiquement les étapes a. à c.
  15. Dispositif selon la revendication 14, caractérisé en ce que le dispositif d'évaluation comporte des moyens destinés à commander le dispositif d'aimantation (40).
  16. Dispositif selon l'une quelconque des revendications 11 à 15, caractérisé en ce que le dispositif d'évaluation est intégré avec le capteur.
  17. Dispositif selon l'une quelconque des revendications 11 à 15, caractérisé en ce que le dispositif d'évaluation et le capteur sont conçus en étant séparés l'un de l'autre dans l'espace.
  18. Dispositif selon l'une quelconque des revendications 11 à 17, caractérisé en ce que le capteur est placé dans la région d'un conducteur de masse (21) ou d'un conducteur positif (20) d'une batterie de véhicule (22), notamment d'une batterie de véhicule automobile.
  19. Dispositif selon l'une quelconque des revendications 11 à 18, caractérisé en ce que le capteur est placé dans la région d'un consommateur (23) électrique ou d'un groupe de consommateurs électriques d'un véhicule, notamment d'un véhicule automobile.
  20. Dispositif selon l'une quelconque des revendications 11 à 19, caractérisé en ce que le premier segment présente une première aimantation de saturation et le deuxième segment présente une deuxième aimantation de saturation et en ce que la première aimantation de saturation est supérieure, inférieure ou égale à la deuxième aimantation de saturation.
  21. Dispositif selon l'une quelconque des revendications 11 à 20, caractérisé en ce que le premier segment (3) du circuit magnétique comporte au moins deux branches (3a, 3b) qui se chevauchent mutuellement et qui dans la région du chevauchement forment un entrefer (30).
  22. Dispositif selon la revendication 21, caractérisé en ce que les branches (3a, 3b) sont façonnées sensiblement en forme d'arc.
  23. Dispositif selon l'une quelconque des revendications 11 à 22, caractérisé en ce que le deuxième segment (41) est conçu sous la forme d'un cadre (4) à noyau de ferrite rectangulaire qui au moins sur un côté porte un enroulement de commande (40) .
  24. Dispositif selon la revendication 23, caractérisé en ce que le cadre (4) à noyau de ferrite comporte respectivement un enroulement de commande (40) sur chaque côté longitudinal du cadre (4) à noyau de ferrite rectangulaire.
  25. Dispositif selon la revendication 23 ou 24, caractérisé en ce que le premier segment (3) est assemblé dans la zone centrale des côtés étroits du cadre (4) à noyau de ferrite rectangulaire.
  26. Utilisation d'un dispositif selon l'une quelconque des revendications 11 à 25 dans un véhicule automobile, pour la supervision de courants dans le réseau de bord d'un véhicule automobile.
  27. Utilisation d'un procédé selon l'une quelconque des revendications 1 à 10 dans un véhicule automobile, pour la supervision de courants dans le réseau de bord du véhicule.
EP06010079.9A 2005-05-25 2006-05-16 Procédé et dispositif destinés à mesurer un courant passant dans un conducteur électrique Expired - Fee Related EP1726967B1 (fr)

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DE102005024075A DE102005024075B4 (de) 2005-05-25 2005-05-25 Verfahren und Vorrichtung zur Messung eines in einem elektrischen Leiter fließenden Stroms

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DE102005024075A1 (de) 2006-11-30
DE102005024075B4 (de) 2007-04-12
EP1726967A1 (fr) 2006-11-29
US20060290341A1 (en) 2006-12-28
US7541799B2 (en) 2009-06-02

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